Here is a snippet of text saved as a JPEG: However, JPEGs are probably not the best option for images containing text. As a result, if you choose the maximum quality option, your image will most likely be indistinguishable from your original photograph, albeit with a correspondingly larger file size.Īfter compression, JPEGs tend to create artifactsĪs stated in the chart above, JPEGs are great for photographs and images with lots of colors. In most design programs, you can choose the degree of compression you wish to apply to individual images-just be aware that by doing so, you also will alter the image’s quality. JPEGs are also “ lossy,” meaning they retain all color information, but compress file size by selectively discarding data-and that compression can result in a loss of quality. JPEG images (short for Joint Photographic Experts Group) are “full-color images that dedicate at least 24 bits of memory to each pixel, resulting in images that can incorporate 16.8 million colors,” and are frequently referenced by their file extension, JPG. Plus, instantly see how your campaigns look in all popular email clients and mobile devices.
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PNG IMAGE CONTRAST ICON PLUS MINUS HOW TO
I'm allready have a UDF to adjust the brightness but now how to detect when needed.įunc _AlterBrightness ( $StartCol, $adjust, $Select = 7 ) Local $Red = String ( $adjust * ( BitAND ( 1, $Select ) 0 ) + BitAND ( $StartCol, 0xFF0000 ) / 0x10000 ) Local $grn = String ( $adjust * ( BitAND ( 2, $Select ) 0 ) + BitAND ( $StartCol, 0x00FF00 ) / 0x100 ) Local $blu = String ( $adjust * ( BitAND ( 4, $Select ) 0 ) + BitAND ( $StartCol, 0x0000FF ) ) Return Hex ( _AlterBrightness _Limit _Column ( $Red ), 2 ) & Hex ( _AlterBrightness _Limit _Column ( $grn ), 2 ) & Hex ( _AlterBrightness _Limit _Column ( $blu ), 2 ) EndFunc =>_AlterBrightness Func _AlterBrightness _Limit _Column ( $cc ) If $cc > 255 Then Return 255 If $cc _AlterBrightness_Limit_ColumnĮxpand collapse popup #include #include #include see Local $c1 = 0xFFFF00 Local $c2 = 0x0000FF GUICreate ( "Calculate color Contrast", 550, 400 ) GUICtrlCreateLabel ( "", 50, 50, 200, 200 ) GUICtrlSetBkColor ( - 1, $c1 ) GUICtrlCreateLabel ( "", 300, 50, 200, 200 ) GUICtrlSetBkColor ( - 1, $c2 ) Local $iContrast = ColorContrast ( $c1, $c2 ) GUICtrlCreateLabel ( Round ( $iContrast, 3 ), 225, 300, 100, 30, $SS_CENTERIMAGE + $SS_CENTER ) GUICtrlSetFont ( - 1, 24 ) GUISetState ( ) While True Switch GUIGetMsg ( ) Case $GUI_EVENT_CLOSE ExitLoop EndSwitch WEnd Func ColorContrast ( $iC1, $iC2 ) Local $iL1 = RelativeLuminescence ( $iC1 ) Local $iL2 = RelativeLuminescence ( $iC2 ) Return $iL1 > $iL2 ? ( $iL1 + 0.05 ) / ( $iL2 + 0.05 ) : ( $iL2 + 0.05 ) / ( $iL1 + 0.05 ) EndFunc Func RelativeLuminescence ( $iColor ) Local $aCol = _ColorGetRGB ( $iColor ) Local $R = $aCol / 255, $G = $aCol / 255, $B = $aCol / 255 $R = $R <= 0.03928 ? $R / 12.92 : ( ( $R + 0.055 ) / 1.055 ) ^ 2.4 $G = $G <= 0.03928 ? $G / 12.92 : ( ( $G + 0.055 ) / 1.055 ) ^ 2.4 $B = $B <= 0.03928 ? $B / 12.92 : ( ( $B + 0.055 ) / 1.055 ) ^ 2.4 Return 0.2126 * $R + 0.7152 * $G + 0. I only want to adjust the brightness when the for and background color looks the same or near the same so that there is more contrast when needed. I'm right this wil give the contrasted color but that is not what I'm looking for.
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